The Roller Derby Alpha Quad Skates are a top of the line skate from Roller Derby. They feature a soft boot that is fully lined suede to ensure you can skate for hours and still feel comfortable. They are fitted with Twister wheels that work both indoor and outdoors. 65mm wheels on the front give you maneuverability and 70mm wheels will give you the speed you desire. The Alpha skates feature air venting to keep your feet cool and the air cushioned footbed will keep your feet soft and comfortable.